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[Bug 1163598] Re: InstanceMetadata content can be None

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Adam Gandelman <1163598@xxxxxxxxxxxxxxxxxx>
Date: Thu, 06 Jun 2013 18:54:25 -0000
Reply-to: Bug 1163598 <1163598@xxxxxxxxxxxxxxxxxx>
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** Changed in: nova/grizzly
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1163598

Title:
  InstanceMetadata content can be None

Status in OpenStack Compute (Nova):
  Fix Released
Status in OpenStack Compute (nova) grizzly series:
  Fix Released

Bug description:
  `content` can be passed in as None, yet there is no guard for this
  case before we iterate over it in a for loop.

  The solution is to set content to empty list if `None` is passed in.

  This also fixes the fact that we're using a mutable arg as a default,
  which is bad practice.

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